#81FF51#81FF51

#81FF51 is a very light, highly saturated green. Relative luminance 0.768; OKLCH L 89.4% C 0.237 H 138.5°. Best body text is #000000 at 16.36:1 contrast (WCAG AA passes).

Color values

HEX	#81FF51
RGB	rgb(129, 255, 81)
HSL	hsl(103, 100%, 66%)
HSV	hsv(103, 68%, 100%)
CMYK	cmyk(49.4%, 0%, 68.2%, 0%)
CIE-LAB	lab(90.22, -64.44, 69.14)
CIE-LCH	lch(90.22, 94.51, 132.98°)
OKLab	oklab(89.42% -0.1777 0.1575)
OKLCH	oklch(89.42% 0.237 138.5)
XYZ	xyz(46.2968, 76.7778, 20.1630)
Luminance	0.7678 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#81FF51 #CF51FF

analogous

#D8FF51 #81FF51 #51FF78

triadic

#81FF51 #5181FF #FF5181

tetradic

#81FF51 #51D8FF #CF51FF #FF7851

square

#81FF51 #51D8FF #CF51FF #FF7851

split-complementary

#81FF51 #7851FF #FF51D8

monochromatic

#3BD600 #55FF14 #81FF51 #ADFF8E #DAFFCB

Accessibility & contrast

On white

1.28

#81FF51 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

16.36

#81FF51 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #81FF51

16.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##81FF51	#FFFFFF	#000000	##000000
##81FF51	1.00	1.28	16.36	16.36
#FFFFFF	1.28	1.00	21.00	21.00
#000000	16.36	21.00	1.00	1.00
##000000	16.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA37

Deuteranopia (green-blind)

#F6DF61

Tritanopia (blue-blind)

#77F6DC

Achromatopsia (no color)

#E3E3E3

Design tokens & code

CSS

--color: #81ff51;
/* rgb */ color: rgb(129, 255, 81);
/* oklch */ color: oklch(89.4% 0.237 138.5);

Tailwind

colors: {
  custom: {
    50: '#afff8a',
    500: '#81ff51',
    950: '#000000',
  },
}

SCSS

$custom: #81ff51;
$custom-light: #afff8a;
$custom-dark: #000000;

JSON

{
  "hex": "#81ff51",
  "rgb": {
    "r": 129,
    "g": 255,
    "b": 81
  },
  "hsl": {
    "h": 103.448,
    "s": 100,
    "l": 65.882
  },
  "oklch": {
    "l": 0.89419,
    "c": 0.23746,
    "h": 138.5
  },
  "luminance": 0.76781
}

Semantic roles & 50–950 ramp

primary

#81FF51

secondary

#A025D0

accent

#00E6A6

background

#FDFFFC

surface

#F8FFF4

border

#D1D7CE

text

#12180C

muted

#82867F

Preview Lab

Preview with #81FF51

Body copy rendered with the generated semantic roles for this colour.

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